- Add draft mode toggle for generating 480p preview videos at reduced cost
- Add draft_task_id input/output for rendering full resolution from draft
- Implement OUTPUT_NODE pattern to send task ID to frontend via ui data
- Add JavaScript listener to auto-populate draft_task_id after draft generation
- Add submit_and_get_result_with_task_id to API handler for returning task IDs
- Support draft parameter in video generation API calls
Draft workflow:
1. Enable draft_mode=true to generate 480p preview
2. Task ID auto-fills after completion
3. Set draft_mode=false to render full resolution using stored draft
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
